Ep 16. Paint it Black

In Supernatural season 10 episode 16, "Paint it Black," Sam and Dean investigate a string of murders in a small town that seem to be linked to an old case involving a nun named Sister Mathias. The brothers soon discover that Sister Mathias was part of a group of nuns who performed exorcisms without the approval of the Church, and that she may have summoned a powerful demon that is now seeking revenge.

As the brothers dig deeper into the case, they come across a young woman named Olivia who has a connection to Sister Mathias and the demon. Olivia is the daughter of one of the nuns who performed exorcisms with Sister Mathias, and she reveals that her mother was possessed by the demon during one of the exorcisms and died soon after. Olivia tells Sam and Dean that she has been haunted by the demon ever since, and that it has been causing her to black out and commit murders.

Sam and Dean are skeptical of Olivia's story at first, but they soon witness her being possessed by the demon and causing chaos in the town. The brothers work to save Olivia and stop the demon from causing any further harm, but they soon realize that they may need to make a deal with the devil in order to save her.

In addition to the supernatural elements of the episode, "Paint it Black" also explores themes of faith and redemption, as Sam and Dean struggle with the idea of working with evil forces in order to achieve a greater good. The episode also delves into the history of the Winchester family and their own experiences with exorcisms and demons.

Overall, "Paint it Black" is a thrilling and thought-provoking episode that further delves into the complex mythology of Supernatural while also delivering plenty of scares and suspense. Fans of the show won't want to miss it.